Interchangeable button



FIG. 1 is a perspective view of an interchangeable button device showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a bottom view thereof; and,

FIG. 4 is a side view thereof.

The broken line showing of a fastening element and swatch is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for interchangeable button, as shown and described. 